Threading-die and holder.



H. M. LOOMER.

THREADING DIE AND HOLDER. APPLICATION FILED NOV-6.19M.

Patented Jan. 16,1917.

WT/VESSIS nisniar M. Loot/nan, or nnvnnmr, nassnonusn'ris.

THREADING-DIE AND HOLDER.

Specification of Letters Patent. Patented J an. I 8, I91l'it Application filed. November 6, 1911. Serial No. 658,871;

To all whom it may concern: i

' Be it known that I, HENRY M. LOOMER, a citizen of the United States, residing at Beverly, in the county of Essex and State of Massachusetts, have invented certain Im- I provements in Threading-Dies and Holders,

of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures. 1

This invention relates to improvements in threading dies and holders therefor.

An object of this invention is to produce a grindable button die and thereby extend the term of usefulness of such dies.

Another object of this invention is the provision of such means for adjusting the cutting edges of such dies that in any ad the penetration of the die into the work;

Fig. 2 shows the button die and the im proved means for adjustment of penetration in their relative positions in the holder.

In Fig. 1, the shank or spindle -1 of the die holder may be of any suitable size or shape for use in ascrew machine, lathe,

' hand stock, or such other desirable operating means as may be used for threading dies. This spindle 1 is shown provided with a wedge separating bar 3 which is operated by, an adjustin 5. In order that the inclined faces 9 of the separating bar 3 shall be presented in proper coincidence with inclined faces 11 of the button die, a slabbed disk '2 is provided which engages a slabbed surface .6 of the separ'ating'bar 3 so as to prevent rotation of the bar 3 in the spindle head 1; "This disk is heldv in place by screw 8.

In Fig. 2 particularlythe relation of the separating bar 3 and thebutton die, 10'is cone point set-screw shown. It will be seen from these views that adjustment of the set screw 5 will elevats or depress separating bar 3. Elevation of bar 3' tends by means of the coincldent inclination of its faces9 with the inclined faces 11 to separate the sections 13 of the die and thus diminish the penetration of all the cutting points 15 into the work. It will be seen that by the provision of two oppositely disposed separating bars,

the equal elevation of these bars will adjust the two sections 13 of the die in symmetrical relation to a plane passing through the center of the holder and midway between the sections so as to equally decrease the amount of penetration into the work of such cuttin points 15 as are diametrically opposite eacl i other. After suitable elevation or depression of the separating bars 3 to adjust desirably the amount of penetrationof the die" into the work the cap 7 is placed, on the threaded end 17 and upon its bein' screwed onto the holder the surface 19 wil bring the button '1 die into proper perpendicular relation to the axis of the holder.

The cap 7 is pro- 1 vided with a knurled portion 21 to enable the operator to obtain a better grip upon it. In order to increase the amount of penetration of the. cutting points 15 it-is v simply necessary to relieve the pressure of surface 19 upon the die by unscrewing the cap 7 and adjustthe set screws 5 outwardly,

thus allowing the separating bars 3 to de-' scend and "upon tightening the cap 7 the button die will be drawn down upon the spindle head. In this downward motion of the die the conical recess 23 tends to close the sectionstl3 of the die and thus increases the amount of penetration of the cutti g;

points 15 into the'work. 'It should be noticed that in the construction here shown the cone point set screws 5 which operate the separating bars 3 are always accessible and the die' 10 may be quickly adjusted without entirely removing the cap 7. It

should also be noticed that the upper and lOWIQI portions'of'the 'die sections 13 have similar conical surfaces so that the die may be reversed in the holder tocut close to shoulders in. the work. A wire 12 seated in the groove 14 keeps the die sections} 13..

together andprevents' the loss of either sec' tion when ,thedie is removed fron'i 'thej; holder, Owing to the spring temperflof the "wit-e12; it may be easily removed from-the sections 13 so that said. sectionsmay be die.

separated when it is desired to sharpen the This operation of sharpening is very simple because, when the sections are taken apart, the cutting edges all lie in planes which are unobstructed except in one direction and there is sufficientunobstructed space adjacent to this plane to allow a grinding wheel or other sharpening implement to be operated therein.

Having described my invention, What I claim as new and desire to secure by Letters Patent is 1. A button threading die and holder having, in combination, a shank, a wedgeshaped'member for spreadingthe die, adjusting means for said wedge-shaped member, means for maintaining said Wedge shaped member in proper alinement, a head on said shank, conically recessed, oppositely disposed surfaces on said die. which are ca-' on the die.

3. A button die and" holder having, in combination, wedge-shaped members and screws for adjusting said memloers, said screws being located externally to the die and at an angle to the wedge-shaped members, all so constructed and arranged that the penetration of the cutting points into the work may be proportionally adjusted by means external to the die and located at an angle to its axis. 1 I

l. A button threading die, adie holder and a cap so constructed and arranged with relation to each other that the die is autoy matically centered by co-acting cone faces on the die and holder and is brought into a plane at right angles to the axis of the holder by co-acting flat faces on thedie and g. The combination of .a threading die formed in sections having thread cutting portions, a holder for said die, a cap for said holder, separating wedges carried by the holder for spreading the sections of the die apart, adjusting means for adjusting said separating wedges, said holder and cap tending to force the thread cutting portions of said die sections to penetrate into the work two subscribing and said separating wedges serving as a stop for the penetration of said thread cutting die sections. t

6. The combination of thread cutting die sections, a holder therefor, a cap for said holder, said sections, holder and cap being so constructed and arranged that the holder and cap cooperate to force the die sections together and to increase their penetration into the work, separating wedges contained in Said holder for determining the amount of penetration of the die sections into the work, and adjusting means for said separating wedges, said adjusting means being in said holder and operable from without said holder .without removing said cap from the holder. I

7. A sectional button threading die and holder therefor having, in'combination, a plurality of wedge-shaped members constructed and arranged to slide in an axial direction, without turning, to separate the sections. of the die and to prevent relative rotation between the die and holder.

8. A sectional button threading die and holder therefor having, in combination, a

plurality of adjustable wedge-shaped members 3 constructed and arranged to slide in an axial direction, without turning, to vary the size of the die and to rotate the die relatively to the work, substantially as described.

9. A sectional button threading die, a

holder therefor, a cap for said die and holder, a plurality of wedge-shaped die separating members contained in said holder, said members co-acting with inclined, plane surfaces'upon the sections of the die, and means for preventing said separating members from turning and for retaining them in the holder.

10. Asa new article of manufacture, a button threading die composed of a plurality of sections, the dividing surfaces between sections consisting of inclined, plane surfaces.

11. For an adjustable button threading die made in sections, a, holder, and adjustable separating members having ends with angularly disposed plane surfaces, said members being contained in the holder and said ends being constructed and arranged to project from the holder into the spaces between the sections of the die.

In testimony whereof I have signed my name to this specification in the presence of witnesses.

HENRY M. LOOMER. Witnesses:

ORTON A. Peon,

ELMZER B. GRUSH. 

